package filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import entity.User;


@WebFilter({ "/LoginFilter", "/login.jsp" })
public class LoginFilter implements Filter {
	public LoginFilter() {
	}

	public void destroy() {
	}

	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		HttpServletRequest req = (HttpServletRequest) request;
		HttpServletResponse res = (HttpServletResponse) response;
		User user = (User) req.getSession().getAttribute("user");
		if (user != null) {
			res.sendRedirect("index.jsp");
			return;
		}
		chain.doFilter(request, response);
	}

	public void init(FilterConfig fConfig) throws ServletException {
	}

}
